When you need a business number or Canada Revenue Agency program accounts

Certain business activities require registration with the CRA.

How to register for a business number

Register for a business number or CRA program accounts by mail, phone, fax, or online.

Changes to your business and tax accounts

For common business changes, make updates online, inform the CRA, and other actions.

Authorize a representative or cancel their authorization

Grant or cancel authorization to a representative, the types of access you can give, and the ways to authorize.

CRA registration and provincial or other federal programs

Your business number registration can be connected to other federal or provincial programs.

COVID-19 and information for employers

Learn about changes that the CRA has introduced to support businesses through the COVID-19 pandemic.